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Lead Paint XRF Testing For Demolished Buildings


City of Sammamish requires Lead Paint testing for all Demolition projects. In Sammamish as a condition of a permit, the Owner / Applicant / Contractor is responsible for complying with Puget Sound Clean Air Agency (206-343-8800) requirements pursuant to Washington Administrative Code Section 173-400-075 regarding the removal of “friable asbestos”.

Lead paint test is required:

If the lead has been determined to be present, then as a condition of the demolition permit the following will be required by the applicant:

  1. Provide advanced community notification with actual demolition dates.
  2. Control dust using water from a water truck or existing water services. If you do not have a water service, you must obtain a water connection. If no water source of connection is available, you may apply for a hydrant permit to use water temporarily from a hydrant.
  3. Using fencing and other barriers to control the spread of dust during and after demolition.
  4. Protect the stormwater drainage system from sediment-laden runoff and loose particles. To the extent possible, use dikes, berms or other methods to protect overland discharge paths from runoff.
  5. Sweep streets gutters, sidewalks, driveways, and other paved surfaces in the immediate area of the demolition daily to collect and properly dispose of loose debris and garbage.
  6. Keep children and other pedestrians away from the site.
  7. Asbestos removal and disposal shall be performed in accordance with Puget Sound Clean Air Agency requirements and State Law.

If the coatings are found to contain detectable levels of lead and portions of this project area with lead-coating paint will be demolished and disposed of, a toxicity characteristic leachate procedure (TCLP) sample that is representative of the waste stream must be collected and analyzed per the requirements of WAC 173-303. Screen the building components to be removed using a field method such as portable XRF. Take representative samples of the components that field screening indicates are lead-contaminated and send for TCLP analysis. Segregate those materials that fail the TCLP test (i.e. have lead concentrations over 5.0 mg/l) for removal as dangerous waste. The remainder is solid waste. Selecting a representative sample: The most conservative approach is to sample every individual component. This may result in excessive and unnecessary sampling for some projects. An alternative approach is to sample each similarly contaminated surface (one sample of each room that has a different paint surface, one sample of each unique baseboard, trim, siding, etc.). Take a full cross-sectional piece of the component for linear components (trim, baseboards, windowsills, etc.). Take proportional amounts of the component for non-linear components (for a window take proportional amounts of any glass, wood, metal, paint, and glazing compound).


Need Lead Paint testing? We perform lead inspections, clearance testing, lead hazard screens, and lead paint risk assessments. Call 425.608.9553